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business
operations management

Questions and Answers of Operations Management

Which technical spec can be most easily modified without changing current choices for the other two technical specs? Quick Start Quick Start QFD Matrix 1 = Strong positive correlation = Some
Consider Quick Start QFD Matrix 2 above. Which two technical specifications are strongly correlated with each other? Quick Start QFD Matrix 2 Strong positive correlation Some positive correlation ==
Customer opinion of Value Feature B is most strongly correlated with what technical specification? Quick Start QFD Matrix 2 Strong positive correlation Some positive correlation == Strong negative
If Technical Specification 2 were reduced in the next design for this product, what would likely happen to customer opinion of Value Feature A? Quick Start QFD Matrix 2 Strong positive correlation
In a recent survey, a 21-year-old gave a movie a score of 10, while a 73-year-old gave it a score of 5, a 45-year-old gave it a score of 7, and a 36-year-old gave it a score of 5.Based on these four
In a recent survey, a 12-year-old gave a movie a score of 4, while a 55-year-old gave it a score of 7, a 32-year-old gave it a score of 6, and a 62-year-old gave it a score of 8.Based on these four
AdventureLand theme park recently received a large number of complaints from customers who had endured delays while waiting to ride on AdventureLand's larg- est roller coaster, Monster Train. As
In a certain QFD analysis, a very strong positive correlation was found between Cus- tomer Value Feature A and Technical Specification 1, while a very strong negative correlation was found between
You are a quality management consultant for the Beserk Tennis Ball Company. Beserk is redesigning its current model of tennis ball, and you are asked to use QFD analysis to make suggestions about
Hallmark Hotels must renovate several of its hotel properties. In preparation, Hall- mark Hotels hired your consulting firm to conduct a QFD analysis to determine what changes, if any, Hallmark
If one forecasting technique were more accurate than another technique when applied to past data, why would the first technique not necessarily be preferred for use in the future?
Does a moving average forecast become more or less responsive to changes in a data series when more data points are included in the average?
Boulevard Industries has decided to provide safety training to its 1,500+ employees who work in the Boulevard main office. Part of this training is a 60-minute presentation by a member of the
Some argue that a crowd of amateurs is often smarter than a group of industry experts when predicting future changes in technology. Why might this be true?
Does an exponential smoothing forecast become more or less responsive to changes in a data series when its alpha is increased?
Holiday Cruise Lines is evaluating the cost of operating its newest ship, the Caribbean Summer. In its first year of operation, the Caribbean Summer completed 25 short cruises along the same route,
Does a high correlation between an independent and a dependent variable prove the independent variable has any influence over the dependent variable? Why or why not?
Tiger Stripe Copy Center is a small business located near a large university campus. Tiger Stripe Copy offers a range of services to walk-in customers, including passport photos,. self-service copy
If a forecast is too high when compared to an actual outcome, will that forecast error be positive or negative?
Quantitative forecasting focuses on past data to project future conditions. Even if this focus produces accurate forecasts, what might be dangerous about this approach?
Are quantitative forecasting models generally used for shorter-term or longer-term decision making when compared to qualitative approaches?
What do quantitative forecasting techniques require, the absence of which makes them ineffective tools for predicting the future?
In time series analysis, any pattern that regularly repeats itself and is constant in length is referred to as what?
The use of which alpha would result in a smoother forecast, a = 0.2 or a = 0.5?
A forecasting technique that takes the previous forecast and adds some percentage of the previous forecast's error is called what?
Which calculation would reveal the bias in a forecasting technique, the mean error or mean absolute deviation?
To calculate a forecast's percent error, the forecast error is divided by what?
Assuming the same set of data is used in their calculation, which will always be the smaller (or perhaps equal) value, the correlation coefficient or the coefficient of determination?
Given forecast errors of 5, 10, -10, 0, 10, what is the ME?
Given forecast errors of 4, 8, and -3, what is the MAD? What is the MSE?
Given forecast errors of 4, 8, and -3, what is the tracking signal?
Given forecast errors of 3, 2, -2, and 9, what is the tracking signal?
Given forecast errors of 10, -2, 25, and 0 when actual values were 120, 145, 275, and 124, what is the mean absolute percent error?
Given an actual demand of 34 this period, a predicted value of 45 this period, and an alpha of 0.2, what would be the simple exponential smoothing forecast for the next period?
Given a forecast of 1,405 and an actual outcome of 1,670, what is the error in the forecast? What is the percent error?
Given a forecast of 2,105 and an actual outcome of 1,980, what is the error in the forecast? What is the percent error?
You are observing the sales department staff using exponential smoothing to fore- cast monthly sales. Their forecast for January's sales was 12,000 units. January's actual sales figure became
The marketing department has just forecast that 10,000 units of item 778 will be ordered in the next fiscal year. Based on the marketing department's forecast and noting that the seasonal relative
Below are the seasonal relatives that describe the weekly fluctuation in the number of distinct users logging into a website daily, also known as the number of unique appearances per day:a.
Tutoring Center needs to allocate tutors this week for office appointments, so it needs to forecast the number of students who will seek appointments. The director has gathered the following time
The South Florida Water Management District (SFWMD) must develop a linear regression model that can be used to estimate the fresh water needs of various com- munities. SFWMD has collected data on 50
Here are the errors associated with a particular forecast over the past 5 months, in chronological order: 5, 10, -15, 0, 8.In which month was the forecast perfectly accurate? In which month was the
A media company is investigating the relationship between movie ticket sales and book sales. The company has gathered information on 30 movies that were based on published books, with total movie
The manager of a building supply center suspects that the monthly sale of rolled insulation for installation in attics depends on the average air temperature during the month. The manager has a
Dunkirk Consulting wishes to predict the amount of overhead expense that will be incurred by a consulting contract, to develop more accurate bids for future con- tracts. Dunkirk has the following
Block Commodities has gathered the following information concerning rock salt deliveries to its clients, which it believes are highly seasonal:a. Suppose Block Commodities calculated a set of
A manager has been using a certain technique to forecast demand for project man- agement software at her store. Actual demand and her corresponding predictions are shown below:a. What was the
The service center at a large automobile dealership is trying to boost revenue by pro- viding no-appointment-necessary oil changes to any type of vehicle that stops by the service center. To quickly
World Transportation Partners (WTP) offers three different intermodal container sizes that clients rent and pack with freight for shipping over- seas. Intermodal containers are measured in TEUS
Why aren't the effective capacity and the optimal operating level of any operation necessarily the same amount of activity?
A certain facility has a design capacity of 2,500 units a day and an effective capacity of 2,225 units. Name one potential determinant of its effective capacity.
DRIVE WIND Driver's Donuts is a bakery and coffee shop that depends on morning com- muters for 80% of its daily business. During the morning rush from 5:30 a.m. to 8:30 a.m., an average of 35 cars
Do capacity cushions represent waste?
What is the volume of output that results in the lowest average unit cost of produc- tion at a facility known as?
Western Motorway Authority (WMA) operates a network of toll roads connecting three urbanized areas. Each of its toll collection plazas offers a choice of payment methods to approaching drivers,
In an economic model discussed in this chapter, the cost of waiting was a cost to whom? Is this necessarily the entire cost of waiting?
If increasing the volume of production is likewise increasing the average cost per unit produced, the system is suffering from what?
Is there any situation in which the cost of waiting is strictly linear? What would such a situation look like? How does the so-called cost of waiting vary between certain situations, such as waiting
Mirrors are sometimes placed in busy lobbies, waiting areas, and on elevator doors. Their purpose is often to make the time pass faster for people waiting in front of them. Which psychological
What is an example of a situation in which the cost of capacity is substantially more than the cost of waiting? What would the waiting line look like in that situation?
What is the body of knowledge concerning mathematical modeling of waiting lines called?
On what do the mathematical and the psychological modelers of waiting disagree?
You are observing a line of people at the ordering counter of a campus coffee house. This line has at least 15 people waiting to order. Suddenly you notice two people walk through the front door of
Think of a particular single-queue, single-server waiting line situation. Which of the M/M/1 model assumptions is least likely to fit that actual situation?
What does queue discipline determine?
Pegasus Veterinary Hospital (PVH) is a partnership of five veterinarian surgeons who specialize in treating horses. PVH is located in a $25 million facility on 20 acres of land, employing over 40
You are a recently appointed purchasing manager who is overseeing terms and con- ditions of contract for an important international purchase with a UN country. What rules should you be particularly
A tender evaluation method specifies 60% price and 40% quality. What is the weighted score of a tender that scored 80 points (out of 100) for price and 60 for quality?
A tender evaluation method specifies 30% price and 70% quality. What is the weighted score of a tender that scored 80 points (out of 100) for price and 60 for quality?
You are reviewing a tender evaluation that is to be awarded on lowest total price. The bid evaluations follow:To which company should the contract be awarded? Company Capital Cost Maintenance
You are analyzing bids from two companies. Company A has scored 85 points on the quality evaluation (out of a scale of 100 points), while company B has scored 95 points. The overall weighting your
You are listening to two employees from your organization's purchasing depart- ment. They are looking over long lists of items purchased by your organization and arguing about how to consolidate
Main Street Cinema is a single-screen movie theater in a residential area. Main Street Cinema is a licensed exhibitor of Mega Pictures Distribution Company, meaning that it receives all its movies
Main Street Cinema invited three firms to bid on its daily janitorial services contract, and then scored those tenders based on quality, reliability/risk, and price (using a 100-point scale in each
Southwestern Food Bank is a large nonprofit organization that secures government grant revenue and private donations to purchase and redistribute bulk quantities of food for shipment to community
You have invited four companies to bid on a consulting project. All four companies answered your invitation to tender, but the bids vary in the number of hours each company estimates will be required
Universal Logistics manages five warehouses, each of which serves several other companies on a contract basis. Universal charges each company an annual fixed fee for each SKU it handles on behalf of
Mathematically, when would the EOQ and the EPQ recommend nearly identical order sizes? How does this relate to the concepts of instantaneous and noninstanta- neous relationships?
If a reorder point is increased, what happens to its service level?
Student Transportation Now Inc. (STN) has a single supply depot that stocks and ships small maintenance items and replacement parts used by techni- cians that maintain STN's fleet of 45,000 school
Why would inventory holding costs be higher for a new business than for a similar business that has been operating for many years?
Denton Pet Clinic is a small business owned by two veternarians who employ two full-time staff members and a new part-time busi- ness manager. The business manager believes that Denton could save
If a reorder point is increased, what happens to its safety stock?
What type of business sells a tangible product and yet has no WIP inventory?
If a reorder point is decreased, what happens to its stock out risk?
If annual demand suddenly fell by half, would the EOQ likewise be reduced by half? Explain.
In a fixed order quantity policy, if the policy's order size is decreased, what happens to average inventory level?
If annual demand suddenly fell by half, would the ROP likewise be reduced by half? Explain.
In a fixed order quantity policy, if the policy's order size is decreased, what happens to the frequency of ordering?
Two items both have reorder points with service levels of 99%. One of the items is ordered 10 times a year, and the other item is ordered 20 times a year. Do these two items have the same overall
In a fixed order quantity policy, if the policy's order size is increased, what happens to the reorder point?
Assuming perfectly constant demand, if lead time increases from 5 to 10 days, what happens to the reorder point?
In an ABC classification scheme, which groups of items will be least tightly controlled?
The two basic issues in inventory are how much to order and what else?
A company that was using the EOQ formula to determine batch sizes realizes it has made a mistake and must recalculate those batch sizes using the EPQ formula. What will happen to batch sizes at this
What is SKU short for?
Is a transaction fee mostly likely an example of a fixed or a variable cost?
Lead time for some SKU is always 5 days, and demand for that SKU is always 50 per day. What is the reorder point for this SKU?
A gift shop sells 400 boxes of scented candles a year. The ordering cost is \($60\) for scented candles, and holding cost is \($24\) per box per year. What is the economic order size for scented
A car rental agency uses 96 boxes of staples a year. The boxes cost \($4\) each. It costs \($10\) to order staples, and it costs \($0.80\) to hold a box of staples in inventory for 1 year. How many

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